manifest

1.maven 配置manifest

在pom文件中 加上 maven-jar-plugin 插件 自定义manifest 属性值

<build>
        <plugins>
            <plugin>  
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                  <archive>
                    <manifest>
                      <addClasspath>true</addClasspath>
                    </manifest>
                    <manifestEntries>
                      <version>${current-version}</version>
                      <struts-version>${struts-version}</struts-version>
                      <spring-version>${spring-version}</spring-version>
                      <hibernate-version>${hibernate-version}</hibernate-version>
                      <api-version>${api-version}</api-version>
                      <sdk-version>${sdk-version}</sdk-version>
                      <environment>${environment}</environment>
                    </manifestEntries>
                  </archive>
                </configuration>
            </plugin>
        </plugins>
    </build>

2 java读取manifest 文件属性

jar 中提供读取jar 包中的manifest 方法  java 代码如下：

<%@ page import="java.io.File" %>
<%@ page import="java.net.InetAddress" %>
<%@ page import="java.util.jar.JarFile" %>
<%@ page import="java.util.jar.Manifest" %>
<%@ page import="java.util.regex.Pattern" %>
<%@ page import="java.util.Map" %>
<%@ page import="java.util.jar.Attributes" %>

String path=new java.io.File(application.getRealPath("manifest.jsp")).getParent();
JarFile jar;
try {
        String packagePath=path+File.separator+"WEB-INF"+File.separator+"lib";
        File file = new File(packagePath);
        if (file.isDirectory()) {
        Pattern pattern = Pattern.compile("mkts-common-{1,}[0-9].{1,}[0-9].jar");
        String[] filelist = file.list();
        for (String fileName : filelist) {
            if (pattern.matcher(fileName).find()) {
                packagePath = packagePath  +File.separator + fileName;
                break;
            }
        }
    }
    jar = new JarFile(packagePath);
    Attributes attributes = jar.getManifest().getMainAttributes();
    for (Map.Entry<Object, Object> entry : attributes.entrySet()) {
        String keyStr = String.valueOf(entry.getKey());
        if ("Class-Path".equals(keyStr) || "Archiver-Version".equals(keyStr))
            continue;
        out.print(entry.getKey() + " : " + entry.getValue());
        %>
        <br />
        <%
    }
} catch (Exception e) {
    e.printStackTrace();
}